Multiple Victims Hospitalized From UPS Center Shooting in San Francisco

UPS workers gather outside after a reported shooting at a UPS warehouse and customer service center in San Francisco on Wednesday, June 14, 2017.

Photographer: Eric Risberg/AP Photo
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San Francisco (AP) -- A UPS employee who had recently filed a grievance opened fire Wednesday inside one of the company's San Francisco packing facilities, killing three co-workers before fatally shooting himself as employees fled frantically into the streets shouting "shooter!," authorities and witnesses said.

The gunman, Jimmy Lam, filed the grievance in March complaining that he was working excessive overtime, Joseph Cilia, an official with a Teamsters Union local that represents UPS workers in San Francisco, told The Associated Press.